<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>新窗口</title>
</head>
<body>
  新窗口

  <button id="btn">给窗口一传递消息</button>

  <script src="./render/new.js"></script>
</body>
</html>